tmp_md = record_metadata_insert(nmem, &(record->metadata[0]), data_text);
YAZ_CHECK(tmp_md);
YAZ_CHECK(0 == record->metadata[0]->next);
tmp_md = record_metadata_insert(nmem, &(record->metadata[0]), data_text);
YAZ_CHECK(tmp_md);
YAZ_CHECK(0 == record->metadata[0]->next);